CN1968456A - Group-call/multicast establishing method and system - Google Patents

Abstract

Translated fromChinese

本发明公开一种组呼/组播建立方法及系统，该方法包括步骤：A.发送要求指配业务信道的信道请求；B.返回确认消息；C.立即指配所述业务信道。本发明利用快速的业务信道来作为组呼/组播建立过程中信令交换的信道，加快组呼/组播的发起过程，特别适合对组呼/组播建立时间要求严格的公安、消防等特殊业务。

The invention discloses a method and system for establishing a group call/multicast. The method includes the steps of: A. sending a channel request for assigning a service channel; B. returning a confirmation message; C. assigning the service channel immediately. The present invention uses a fast service channel as a channel for signaling exchange in the group call/multicast establishment process, speeds up the group call/multicast initiation process, and is especially suitable for public security, fire control, etc. that have strict requirements on the group call/multicast establishment time special business.

Description

Translated fromChinese

组呼/组播建立方法及系统Group call/multicast establishment method and system

技术领域technical field

本发明涉及移动通信领域中的组呼/组播技术，特别是涉及一种在基于GSM(Global System for Mobile Communication，全球移动通信系统)的集群通信网络中实现快速组呼呼叫的组呼/组播建立方法及系统。The present invention relates to the group call/multicast technology in the field of mobile communication, in particular to a group call/group call that realizes fast group call calls in a trunked communication network based on GSM (Global System for Mobile Communication, Global System for Mobile Communication) Broadcast establishment method and system.

背景技术Background technique

GSM是目前通用的一种移动通信系统，除了能实现基本的移动通信业务外，人们还研发出在GSM中实现组呼通信的技术。以组呼/组播技术主要应用系统GSM-R系统为例，该系统是最早实现组呼/组播的一种通信系统，是欧洲制定的一套用于铁路移动通信的系统。GSM-R以GSM通信技术作为业务承载，通过eMLPP(enhanced Multi-Lever Precedence and Pre-emption，增强型多级优先和占先)业务给移动台(MS)提供VGCS(Voice Group Call Service，语音组呼业务)和VBS(Voice Broadcasting Service，语音组播业务)等集群业务。GSM is a common mobile communication system at present. In addition to realizing basic mobile communication services, people have also developed a technology for realizing group call communication in GSM. Take the GSM-R system, the main application system of group call/multicast technology, as an example. This system is the earliest communication system to realize group call/multicast, and it is a system developed by Europe for railway mobile communication. GSM-R uses GSM communication technology as the service bearer, and provides VGCS (Voice Group Call Service) to the mobile station (MS) through the eMLPP (enhanced Multi-Lever Precedence and Pre-emption) service. Business) and cluster services such as VBS (Voice Broadcasting Service, voice multicast service).

GSM-R中的VGCS业务是实现在无线通信系统中多个人可以讲话，更多的人可以监听的任务，并且听者数量无限制；GSM-R中的VBS业务是实现1个人讲话，多个人监听的业务。参与VGCS呼叫的成员包括两类：调度员和业务用户。The VGCS service in GSM-R is to realize the task that multiple people can speak and more people can listen in the wireless communication system, and the number of listeners is unlimited; the VBS service in GSM-R is to realize that one person speaks, and multiple people monitoring business. Members participating in a VGCS call include two categories: dispatchers and business users.

VGCS业务呼叫在任何时刻只准许1个业务用户及至多5个调度员同时讲话。处于听状态的业务用户可以通过抢上行的操作，即按PTT(Push To Talk)键获得讲话权参与讲话，抢上行的操作按照“先到先得”的方式进行，谁先抢到谁说话，其他业务用户只有当上行空闲时才可以继续抢上行的操作。调度员由于具有自己的专用通道，所以无需抢上行的操作，随时可以参与讲话。VGCS business calls allow only one business user and at most five dispatchers to speak at the same time at any time. Business users in the listening state can press the PTT (Push To Talk) button to get the right to speak and participate in the speech by pressing the uplink operation. The uplink operation is carried out in a "first come, first served" manner. Other service users can continue to grab the uplink operation only when the uplink is idle. Since the dispatcher has his own dedicated channel, he can participate in the speech at any time without rushing to the uplink operation.

VGCS允许用户建立到属于某一指定服务区和GID(Group ID，组识别号)的一组用户的呼叫，呼叫期间所有的调度员都可以发言，但是所有的业务用户抢占一个上行通道。服务区可由若干属于同一MSC(Mobile Service SwitchingCenter，移动业务交换中心)或不同MSC的小区组成，呼叫时每个相关小区有一个组呼通道，其中上行链路仅供组发射模式下的当前讲者使用，所有听者守侯在组接收模式的下行链路上，有关组呼的通知消息在NCH(NotificationChannel，通知信道)上广播。VGCS allows users to establish a call to a group of users belonging to a specified service area and GID (Group ID, Group Identification Number). During the call, all dispatchers can speak, but all business users occupy an uplink channel. The service area can be composed of several cells belonging to the same MSC (Mobile Service Switching Center) or different MSCs. When calling, each relevant cell has a group call channel, and the uplink is only for the current speaker in the group transmission mode. In use, all listeners wait on the downlink of the group receiving mode, and the notification message about the group call is broadcast on the NCH (Notification Channel, notification channel).

VBS与VGCS业务基本类似，主要不同之处在于：在VBS呼叫期间只有呼叫发起者可以讲话，其他成员始终处于接收状态。讲话用户无须按PTT键。VBS and VGCS services are basically similar, the main difference is: only the call initiator can speak during the VBS call, and other members are always in the receiving state. The speaking user does not need to press the PTT key.

GSM-R中的eMLPP业务可以给使用VGCS业务或VBS业务的不同移动台提供不同级别的组呼业务，使不同的移动台享有使用VGCS业务或VBS业务的不同组呼权限。例如，eMLPP业务可以根据呼叫建立时间的不同将移动台的组呼分为三级：1级为快速建立，组呼建立时间为1～2秒；2级为正常建立，组呼建立时间小于5秒；3级为慢速建立，组呼建立时间小于10秒。The eMLPP service in GSM-R can provide different levels of group call services to different mobile stations using VGCS services or VBS services, so that different mobile stations can enjoy different group call rights for using VGCS services or VBS services. For example, the eMLPP service can divide the group calls of mobile stations into three levels according to the call establishment time: level 1 is fast establishment, and the group call establishment time is 1 to 2 seconds; level 2 is normal establishment, and the group call establishment time is less than 5 seconds. seconds; Level 3 is slow establishment, and the group call establishment time is less than 10 seconds.

对于一些特殊业务比如公安与消防，需要尽量快地建立组呼/组播。如图1和图2所示，其是现有技术中采用GSM-R中的eMLPP业务实现快速组呼的流程图。图1简单显示从信道请求到建立连接的十个简化流程。图2则显示包括网络各单元间信令流程的具体流程。假设进行组呼的MS和组呼区域内的MS由同一MSC管辖，其建立组呼的具体步骤为：For some special services such as public security and fire protection, it is necessary to establish group calls/multicasts as quickly as possible. As shown in FIG. 1 and FIG. 2 , it is a flow chart of implementing a fast group call by using the eMLPP service in GSM-R in the prior art. Figure 1 simply shows ten simplified processes from channel request to connection establishment. Fig. 2 shows the specific flow including the signaling flow between each unit of the network. Assuming that the MS making a group call and the MSs in the group call area are under the jurisdiction of the same MSC, the specific steps for establishing a group call are as follows:

发起组呼的移动台发起快速组呼业务请求，该MS向所属的BSS(BaseStation sub-System，基站子系统)上报分配信道请求(CHANNEL REQUEST)；The mobile station that initiates a group call initiates a quick group call service request, and the MS reports a channel allocation request (CHANNEL REQUEST) to the BSS (BaseStation sub-System, base station subsystem) to which it belongs;

该BSS收到该请求后，给该移动台指配上行业务信道，并等待立即指配命令(IMMEDIATE ASSIGNMENT)消息；After receiving the request, the BSS assigns an uplink traffic channel to the mobile station, and waits for an immediate assignment command (IMMEDIATE ASSIGNMENT) message;

MS收到立即指配命令消息后，开始立即指配流程，其作用是网络根据移动台的请求来分配一个信令信道，用于呼叫建立初始过程中信令交互。这个分配的信令信道可以是SDCCH(SD信道，独立专有控制信道)，也可以是TCH(业务信道)。具体是在SD信道上发送携带IMM SETUP消息的设置异步平衡模式消息(SABM)消息建链；该MS在所分配的信令信道上通过BSS向MSC上报层三业务请求消息，层三业务请求消息即快速组呼/组播请求，并返回通知消息；After the MS receives the immediate assignment command message, it starts the immediate assignment process. Its function is that the network allocates a signaling channel according to the mobile station's request, which is used for signaling interaction in the initial process of call establishment. The allocated signaling channel can be SDCCH (SD channel, independent dedicated control channel) or TCH (traffic channel). Specifically, on the SD channel, a set asynchronous balanced mode message (SABM) message carrying an IMM SETUP message is sent to establish a link; the MS reports a layer three service request message to the MSC through the BSS on the assigned signaling channel, and the layer three service request message That is, fast group call/multicast request, and return notification message;

MSC收到该层三业务请求后确定本次呼叫为快速组呼/组播呼叫，则检查在VLR(拜访位置寄存器)的记录，判断该MS是否具有快速发起该组呼/组播的呼叫权限，如果有，执行下一步骤；否则，释放此次组呼/组播请求并告知失败；After the MSC receives the Layer 3 service request, it determines that the call is a fast group call/multicast call, then checks the record in the VLR (Visitor Location Register) to determine whether the MS has the call authority to quickly initiate the group call/multicast call , if yes, go to the next step; otherwise, release the group call/multicast request and report failure;

由于预先在VLR设置有所有MS的发起组呼呼叫权限，所以查询VLR就可以获取该MS的组呼权限；Since the VLR is pre-set with all MS's group call initiation rights, the MS's group call rights can be obtained by querying the VLR;

MSC向该MS所属的BSS发送指配请求消息(ASSIGNMENT_REQUEST)，开始指配流程。BSC发送指配命令消息给MS。把SD信道信令交换模式转换为TCH信道信令交互模式；The MSC sends an assignment request message (ASSIGNMENT_REQUEST) to the BSS to which the MS belongs to start the assignment process. The BSC sends an Assignment Command message to the MS. Convert SD channel signaling exchange mode to TCH channel signaling interaction mode;

由MS向BTS发送SABM消息开始，BSS建立从该MS到该BSS的组呼信道和从该BSS到MSC的组呼信道，BSS建立组呼信道完成后给MSC发送指配完成消息(ASSIGNMENT_COMPLETE)，该指配完成消息携带该MS的呼叫组标识(Group ID)；The MS sends a SABM message to the BTS, and the BSS establishes a group call channel from the MS to the BSS and a group call channel from the BSS to the MSC. After the BSS establishes the group call channel, it sends an assignment complete message (ASSIGNMENT_COMPLETE) to the MSC. The assignment completion message carries the calling group identifier (Group ID) of the MS;

MSC根据收到的Group ID和检测到的发起组呼的MS的CID(Cell ID，小区标识)向GCR(Group Call Register，组呼寄存器)查询组呼参考及组呼属性信息，从而确定组呼的范围；The MSC inquires the group call reference and group call attribute information from the GCR (Group Call Register) according to the received Group ID and the detected CID (Cell ID, cell ID) of the MS that initiates the group call, thereby determining the group call range;

GCR返回组呼参考及属性，并且将组呼标记为正在呼叫；GCR存放组呼参考及组呼属性，如：组呼的区域范围，根据GID和该MS具有的CID就可以得到组呼参考及组呼属性；GCR returns the group call reference and attributes, and marks the group call as calling; GCR stores the group call reference and group call attributes, such as: the area range of the group call, according to the GID and the CID of the MS, the group call reference and Group call attributes;

MSC收到组呼属性后，确定组呼范围，与管辖组呼区域的BSS进行A接口电路的连接后，给管辖组呼区域的BSS发送组呼指配请求(ASSIGNMENTREQUEST)；After receiving the group call attribute, the MSC determines the group call range, and after connecting the A interface circuit with the BSS in charge of the group call area, sends a group call assignment request (ASSIGNMENTREQUEST) to the BSS in charge of the group call area;

管辖组呼区域的BSS收到该请求后，给组呼区域中的小区分配地面电路资源和无线资源后，给MSC发送组呼指配完成消息，并且给在组呼区域中的小区发送组呼通知消息；最后在BSC和BTS之间进行多道信令交互以释放暂时的信令信道；After receiving the request, the BSS in charge of the group call area allocates ground circuit resources and radio resources to the cells in the group call area, sends a group call assignment completion message to the MSC, and sends a group call assignment to the cells in the group call area. Notification message; Finally, multiple signaling interactions are performed between the BSC and the BTS to release the temporary signaling channel;

组呼区域中小区的MS收到通知消息后，最终建立组呼/组播信道，MS转至组呼信道进行监听。After receiving the notification message, the MS in the cell in the group call area finally establishes a group call/multicast channel, and the MS turns to the group call channel to monitor.

以上，现有技术中的立即指配流程花费组呼/组播建立流程中的太多时间。因为立即指配是根据移动台的请求来分配一个信令信道，这个分配的信令信道可以是SDCCH，也可以是TCH。立即指配TCH建立连接的时间要比分配SDCCH建立连接的时间短很多，TCH块的间隔是20ms，SDCCH块间隔是235ms，因此建立连接以后，信令在TCH上传送的速度也比在SDCCH上快很多。而在立即指配流程中，网络选择分配SDCCH还是TCH，是根据信道的占用情况，以及信道请求的原因值等来判断的。例如对于原因值是紧急呼叫的信道请求，一般分配TCH。除此之外，组呼/组播呼叫的信道请求原因值与普通呼叫的原因值是一样的，网络只能给所有发起呼叫的移动台分配TCH作为信令信道，或者给所有发起呼叫的移动台分配SDCCH作为信令信道。但现有网络无法在分配信令信道之前判断移动台要发起的呼叫是否是组呼/组播呼叫，因此经常造成组呼/组播建立流程过长，影响组呼业务的及时开展。Above, the immediate assignment process in the prior art takes too much time in the group call/multicast setup process. Because the immediate assignment is to allocate a signaling channel according to the request of the mobile station, the allocated signaling channel can be SDCCH or TCH. The time for immediately assigning TCH to establish a connection is much shorter than the time for allocating SDCCH to establish a connection. The TCH block interval is 20ms, and the SDCCH block interval is 235ms. Therefore, after the connection is established, the signaling is transmitted on the TCH faster than on the SDCCH. Much faster. In the immediate assignment process, the network chooses to allocate SDCCH or TCH, which is judged according to the channel occupancy and the reason value of the channel request. For example, for a channel request whose cause value is an emergency call, a TCH is generally allocated. In addition, the channel request reason value of group call/multicast call is the same as that of ordinary call, and the network can only allocate TCH as a signaling channel to all calling mobile stations, or to all calling mobile stations The station allocates SDCCH as a signaling channel. However, the existing network cannot judge whether the call to be initiated by the mobile station is a group call/multicast call before allocating the signaling channel, so the process of setting up the group call/multicast is often too long, which affects the timely development of the group call service.

发明内容Contents of the invention

本发明要解决的技术问题是提供一种快速的组呼/组播建立方法。The technical problem to be solved by the present invention is to provide a fast group call/multicast establishment method.

本发明要解决的技术问题是又提供一种高速的组呼/组播建立系统。The technical problem to be solved by the present invention is to provide a high-speed group call/multicast establishment system.

为解决上述第一技术问题，本发明的目的是通过以下技术方案实现的：提供一种组呼/组播建立方法，包括步骤：A、发送要求指配业务信道的信道请求；C、立即指配所述业务信道。In order to solve the above-mentioned first technical problem, the purpose of the present invention is achieved by the following technical solutions: a method for setting up a group call/multicast is provided, comprising the steps of: A, sending a channel request requiring assignment of a service channel; C, immediately assigning Configure the business channel.

在步骤A和C之间，还包括步骤：B、返回确认消息。Between steps A and C, further includes step: B, returning a confirmation message.

所述确认消息是含业务信道信息的立即指配消息。The confirmation message is an immediate assignment message including traffic channel information.

步骤A中所述信道请求消息包含代表组呼/组播呼叫的原因值。The channel request message in step A includes a cause value representing a group call/multicast call.

所述包含代表组呼/组播呼叫的原因值是“01100001”、“01100101”或“01100011”。The value containing the cause representing the group call/multicast call is "01100001", "01100101" or "01100011".

在步骤C之后，还包括步骤：D、上报组呼/组播发起请求消息给移动业务交换中心；E、返回组呼/组播确认消息。After step C, further steps are included: D, reporting a group call/multicast initiation request message to the mobile service switching center; E, returning a group call/multicast confirmation message.

在步骤E之后，还包括步骤：F、发送信道模式修改消息到移动台；G、返回信道模式修改响应消息，组呼/组播信道建立；After step E, also include steps: F, send channel mode modification message to mobile station; G, return channel mode modification response message, group call/multicast channel establishment;

H、在组呼/组播信道中进行讲话或监听。H. Speak or monitor in the group call/multicast channel.

在步骤D和E之间、或在步骤H之后，还包括步骤：I、进行组呼/组播权限认证；J、进行组呼/组播属性获取。Between steps D and E, or after step H, further steps are included: I, performing group call/multicast authority authentication; J, performing group call/multicast attribute acquisition.

步骤C中的立即指配所述业务信道步骤是从发送设置异步平衡模式消息开始。The step of immediately assigning the traffic channel in step C starts from sending a message of setting an asynchronous balanced mode.

所述发送设置异步平衡模式消息是：采用偷帧方式发送携带SETUP消息的设置异步平衡模式消息。The sending of the setting asynchronous balance mode message is: sending the setting asynchronous balance mode message carrying the SETUP message by frame stealing.

为解决上述第二技术问题，本发明的目的是通过以下技术方案实现的：提供一种组呼/组播建立系统，包括信道请求发送模块和业务信道指配模块，所述信道请求发送模块发送要求指配业务信道的信道请求，所述业务信道指配模块进行立即指配所述业务信道操作。In order to solve the above-mentioned second technical problem, the purpose of the present invention is achieved through the following technical solutions: provide a system for establishing a group call/multicast, including a channel request sending module and a service channel assignment module, and the channel request sending module sends For a channel request requiring assignment of a traffic channel, the traffic channel assignment module immediately assigns the traffic channel.

还包括基站控制器，所述基站控制器接收信道请求并返回确认消息。Also included is a base station controller that receives the channel request and returns an acknowledgment message.

所述信道请求消息包含代表组呼/组播呼叫的原因值，所述确认消息是含业务信道信息的立即指配消息。The channel request message includes a cause value representing a group call/multicast call, and the confirmation message is an immediate assignment message including traffic channel information.

所述信道请求发送模块从发送携带SETUP消息的设置异步平衡模式消息开始立即指配所述业务信道。The channel request sending module assigns the traffic channel immediately after sending a set asynchronous balanced mode message carrying a SETUP message.

以上第一技术方案可以看出，由于本发明在组呼/组播建立时采用立即指配业务信道的立即指配流程来建立移动台和网络的信令连接。即在移动台向网络发起的第一条信令-信道请求的原因值中标明组呼/组播呼叫类型，让网络识别该呼叫类型为组呼/组播，从而立即指配一条速度较快的业务信道用以组呼/组播建立时的信令交互。克服现有技术组呼/组播建立的立即指配流程之前网络无法识别组呼/组播呼叫而经常立即指配SD信道的缺陷，因此大大加快组呼/组播的发起过程。It can be seen from the above first technical solution that the present invention uses an immediate assignment process of immediately assigning traffic channels to establish a signaling connection between a mobile station and a network when a group call/multicast is established. That is, the group call/multicast call type is marked in the cause value of the first signaling-channel request initiated by the mobile station to the network, so that the network can identify the call type as group call/multicast, and immediately assign a faster The traffic channel is used for signaling interaction when group call/multicast is established. It overcomes the defect that the network cannot identify the group call/multicast call and often immediately assigns the SD channel before the immediate assignment process of the group call/multicast establishment in the prior art, thus greatly speeding up the initiation process of the group call/multicast.

以上第二技术方案可以看出，由于本发明增设信道请求发送模块和业务信道指配模块，在组呼/组播建立时采用立即指配业务信道的立即指配流程来建立移动台和网络的信令连接。即信道请求发送模块在移动台向网络发起的第一条信令-信道请求的原因值中标明组呼/组播呼叫类型，让网络识别该呼叫类型为组呼/组播，从而让业务信道指配模块立即指配一条速度较快的业务信道用以组呼/组播建立时的信令交互。克服现有技术组呼/组播建立的立即指配流程之前网络无法识别组呼/组播呼叫而经常立即指配SD信道的缺陷，因此大大加快组呼/组播的发起过程。As can be seen from the second technical solution above, since the present invention adds a channel request sending module and a service channel assignment module, when group call/multicast is set up, the immediate assignment process of immediately assigning a service channel is adopted to establish the connection between the mobile station and the network signaling connection. That is, the channel request sending module indicates the group call/multicast call type in the cause value of the first signaling-channel request initiated by the mobile station to the network, so that the network can identify the call type as group call/multicast, so that the service channel The assigning module immediately assigns a faster traffic channel for signaling interaction when the group call/multicast is established. It overcomes the defect that the network cannot identify the group call/multicast call and often immediately assigns the SD channel before the immediate assignment process of the group call/multicast establishment in the prior art, thus greatly speeding up the initiation process of the group call/multicast.

附图说明Description of drawings

图1是现有技术实现快速组呼的简化流程图；Fig. 1 is the simplified flow chart that realizes fast group call in prior art;

图2是图1的包括网络各单元之间信令交互的具体流程图；FIG. 2 is a specific flow chart of FIG. 1 including signaling interaction between each unit of the network;

图3是本发明组呼/组播建立方法的简化流程图；Fig. 3 is a simplified flow chart of the group call/multicast establishment method of the present invention;

图4是图3的包括网络各单元之间信令交互的具体流程图；FIG. 4 is a specific flow chart of FIG. 3 including signaling interaction between each unit of the network;

图5是本发明组呼/组播建立系统的功能框图。Fig. 5 is a functional block diagram of the group call/multicast establishment system of the present invention.

具体实施方式Detailed ways

本发明的基本原理是：在组呼/组播建立时采用立即指配业务信道的立即指配流程来建立移动台和网络的信令连接。而信道请求是立即指配流程中分配信令信道之前移动台能够上报的唯一消息，因此在信道请求原因值中标明组呼/组播呼叫类型，网络识别该呼叫类型后立即指配一条业务信道用以组呼/组播建立时的信令交互。The basic principle of the present invention is: when the group call/multicast is established, the signaling connection between the mobile station and the network is established by adopting the immediate assignment process of immediately assigning the service channel. The channel request is the only message that the mobile station can report before the signaling channel is allocated in the immediate assignment process, so the group call/multicast call type is indicated in the channel request cause value, and the network immediately assigns a traffic channel after identifying the call type It is used for signaling interaction when group call/multicast is established.

为了使本发明的目的、技术方案和优点更加清楚明白，以下举实施例并参照附图，对本发明进行进一步详细说明。In order to make the purpose, technical solution and advantages of the present invention more clear, the present invention will be further described in detail by citing the following embodiments and referring to the accompanying drawings.

参阅图3和图4，分别是本发明组呼/组播建立方法的简化流程图和包括网络单元之间信令交互的具体流程图。所述方法包括以下步骤：Referring to FIG. 3 and FIG. 4 , they are respectively a simplified flow chart of the group call/multicast establishment method of the present invention and a specific flow chart including signaling interaction between network elements. The method comprises the steps of:

A、发送要求指配业务信道的信道请求；A. Send a channel request for assigning a traffic channel;

首先移动台向网络侧发出呼叫请求。该呼叫请求是以移动台向基站收发信台发送信道请求(CHANNEL REQUIRED)为开端。参阅表一的信道请求原因值列表，所述信道请求消息包含代表组呼/组播呼叫的原因值“01100001”、“01100101”或“01100011”。基站收发信台收到信道请求后将其上报基站控制台，基站控制台激活随机接入信道。   原因值   含义   101xxxxx   紧急呼叫(Emergency call)110xxxxx   呼叫重建，以前使用全速率业务信道，或者虽然以前使用半速率业务信道，但是网络没有设置新建原因指示参数为1(TCH/H was in use or TCH/H was in use but the network doesnot set NECI bit to 1)011010xx   呼叫重建，以前使用半速率业务信道，并且网络设置新建原因指示参数为1(Callre-establishment；TCH/H was in use and the network sets NECI bit to 1)011011xx   呼叫重建，以前使用半速率业务信道+半速率业务信道，并且网络设置新建原因指示参数为1(Call re-establishment；TCH/H+TCH/H was in use and the network sets NECl bit to 1)   100xxxxx0010xxxx0011xxxx0001xxxx响应寻呼，看表9.1.8.2(Answer to paging See Table 9.1.8.2.)111xxxxx1   发起呼叫并且需要使用全速率业务信道，或者发起呼叫并且网络没有设置新建原因指示参数为1，或者可以采用SDCCH完成的流程并且网络没有设置新建原因指示参数为1(Originating call and TCH/F is needed，or originating call and the network does not set NECIbit to 1，or procedures that can be completed with a SDCCH and the network does not setNECI bit to 1.)0100xxxx   双速率移动台发起语音呼叫，半速率业务信道足够并且移动台支持半速率业务信道用做语音呼叫并且网络设置新建原因指示参数为1(Originating speech call from dual-rate mobilestation when TCH/H is sufficient and supported by the MS for speech calls and the networksets NECI bit to 1.)0101xxxx   双速率移动台发起数据呼叫，半速率业务信道足够并且移动台支持半速率业务信道用做数据呼叫并且网络设置新建原因指示参数为1(Originating data call from dual-rate mobilestation when TCH/H is sufficient and supported by the MS for data calls and the networksets NECI bit to 1.See note 5)000xxxxx   位置更新并且网络没有设置新建原因指示参数为1(Location updating and the network doesnot set NECI bit to 1)0000xxxx   位置更新并且网络设置新建原因指示参数为1(Location updating and the network setsNECI bit to 1)0001xxxx   其它可以使用SDCCH完成的流程并且网络设置新建原因指示参数为1(Other procedureswhich can be completed with note lan SDCCH and the network sets NECl bit to 1)   011110xx01111x0x01111xx0   一阶段分组访问请求单时隙上行传输，需要一个PDCH(分组数据信道)(One phase packetaccess with request for single timeslot uplink transmission；one PDCH is needed.)01110xxx   单块分组访问；需要PDCH的一块，用于二阶段分组访问或者其它RR(无线资源)信令(Single block packet access；one block period on a PDCH is needed for two phase packetaccess or other RR signalling purpose.)   01100111   定位测量单元建立(LMU establishment)01100xx0   单块多媒体广播/多播业务访问；需要PDCH的一块，用于发送多媒体广播/多播业务的业务请求消息(Single block MBMS access；one block period on a PDCH is needed for transferof MBMS SERVICE REQUEST message.)   01100x0101100011发起组呼/组播呼叫(Originating VGCS/VBS call)   01111111   保留(Reserved)First, the mobile station sends a call request to the network side. The call request starts with the mobile station sending a channel request (CHANNEL REQUIRED) to the base transceiver station. Referring to the list of channel request cause values in Table 1, the channel request message includes the cause value "01100001", "01100101" or "01100011" representing a group call/multicast call. After receiving the channel request, the base transceiver station reports it to the base station console, and the base station console activates the random access channel. cause value meaning 101xxxxx Emergency call 110xxxxx Call reestablishment, the full-rate traffic channel was used before, or although the half-rate traffic channel was used before, the network did not set the new reason indication parameter to 1 (TCH/H was in use or TCH/H was in use but the network does not set NECI bit to 1) 011010xx Call re-establishment, the half-rate traffic channel was used before, and the network set the new reason indication parameter to 1 (Call re-establishment; TCH/H was in use and the network sets NECI bit to 1) 011011xx Call re-establishment, previously used half-rate traffic channel + half-rate traffic channel, and the network set the new reason indication parameter to 1 (Call re-establishment; TCH/H+TCH/H was in use and the network sets NECl bit to 1) 100xxxxx0010xxxx0011xxxx0001xxxx To respond to paging, see Table 9.1.8.2 (Answer to paging See Table 9.1.8.2.) 111xxxxx1 Initiate a call and need to use a full-rate traffic channel, or initiate a call and the network does not set the new cause indication parameter to 1, or use the SDCCH completion process and the network does not set the new cause indication parameter to 1 (Originating call and TCH/F is needed , or originating call and the network does not set NECI bit to 1, or procedures that can be completed with a SDCCH and the network does not set NECI bit to 1.) 0100xxxx The dual-rate mobile station initiates a voice call, the half-rate traffic channel is sufficient and the mobile station supports the half-rate traffic channel for voice calls and the network sets the new cause indication parameter to 1 (Originating speech call from dual-rate mobilestation when TCH/H is sufficient and supported by the MS for speech calls and the networksets NECI bit to 1.) 0101xxxx The dual-rate mobile station initiates a data call, the half-rate traffic channel is sufficient and the mobile station supports the half-rate traffic channel for data calls and the network sets the new cause indication parameter to 1 (Originating data call from dual-rate mobilestation when TCH/H is sufficient and supported by the MS for data calls and the networksets NECI bit to 1. See note 5) 000xxxxx Location updating and the network does not set NECI bit to 1 (Location updating and the network does not set NECI bit to 1) 0000xxxx Location updating and the network sets NECI bit to 1 (Location updating and the network setsNECI bit to 1) 0001xxxx Other procedures which can be completed with note lan SDCCH and the network sets NECl bit to 1 (Other procedures which can be completed with note lan SDCCH and the network sets NECl bit to 1) 011110xx01111x0x01111xx0 One-phase packet access with request for single timeslot uplink transmission requires a PDCH (Packet Data Channel) (One phase packet access with request for single timeslot uplink transmission; one PDCH is needed.) 01110xxx Single block packet access; one block period on a PDCH is needed for two phase packet access or other RR signaling purpose. 01100111 LMU establishment (LMU establishment) 01100xx0 Single block MBMS access; one block period on a PDCH is needed for transfer of MBMS SERVICE REQUEST message. 01100x0101100011 Initiating a group call/multicast call (Originating VGCS/VBS call) 01111111 Reserved

表一Table I

上表中，“01100x01”、“01100011”字节原先定义为“未使用”。本发明采用该字节作为组呼/组播呼叫的专用信道请求原因值，如原因值为“101xxxxx”的紧急呼叫(移动台拨打“110”等紧急电话)进入快速呼叫流程一样，网络可以辨认出该呼叫为组呼/组播呼叫。In the above table, the bytes "01100x01" and "01100011" were originally defined as "unused". The present invention adopts this byte as the reason value of the dedicated channel request of the group call/multicast call, as the emergency call (the mobile station dials "110" and other emergency calls) with the cause value "101xxxxx" enters the fast call process, and the network can identify The outgoing call is a group call/multicast call.

B、返回确认消息；B. Return a confirmation message;

当基站收发信台收到该信道请求时，辨认出该呼叫为组呼/组播呼叫。于是返回立即指配的确认消息(IMMEDIATE ASSIGNMENT COMMAND)到移动台。所述确认消息含业务信道信息描述，表明网络辨认出该呼叫为组呼/组播呼叫，并允许移动台进行该呼叫。When the base transceiver station receives the channel request, it recognizes the call as a group call/multicast call. Then return an immediately assigned confirmation message (IMMEDIATE ASSIGNMENT COMMAND) to the mobile station. The acknowledgment message contains a description of the traffic channel information, indicating that the network recognizes the call as a group call/multicast call and allows the mobile station to make the call.

另外，可预先确定该移动台的组呼区域小区，其过程为：预先在基站子系统设置该移动台与该次呼叫对应的组呼区域小区对应关系，基站子系统根据预先设置的对应关系确定该次呼叫对应的组呼区域小区。In addition, the group call area cell of the mobile station can be pre-determined, and the process is as follows: the corresponding relationship between the mobile station and the group call area cell corresponding to the call is set in the base station subsystem in advance, and the base station subsystem determines the group call area cell according to the preset correspondence relationship. The group call area cell corresponding to this call.

C、立即指配所述业务信道；C. Immediately assign the traffic channel;

该步骤从移动台发送设置异步平衡模式消息(SABM)开始。由于已经在第一条信道请求信令中告知网络该呼叫是组呼/组播呼叫，网络辨认出所述信道请求要求指配业务信道，于是立即指配所述业务信道给该呼叫。具体是移动台发送携带CM SERVICE REQUEST的设置异步平衡模式消息到基站收发信台进入立即指配流程，同时表明该呼叫请求是组呼/组播发起请求。This step starts with the mobile station sending a Set Asynchronous Balanced Mode Message (SABM). Since the network has been informed in the first channel request signaling that the call is a group call/multicast call, the network recognizes that the channel request requires assignment of a traffic channel, and immediately assigns the traffic channel to the call. Specifically, the mobile station sends an asynchronous balanced mode message carrying CM SERVICE REQUEST to the base transceiver station to enter the immediate assignment process, and at the same time indicates that the call request is a group call/multicast initiation request.

D、上报组呼/组播发起请求消息给基站控制器；D. Reporting a group call/multicast initiation request message to the base station controller;

基站收发信台收到移动台发送的组呼/组播发起请求后，将该组呼/组播发起请求向移动业务交换中心上报层三业务请求消息(COMPLETE LAYER 3INFORMATION)，层三业务请求消息即快速组呼/组播请求。After receiving the group call/multicast initiation request sent by the mobile station, the base transceiver station reports the group call/multicast initiation request to the mobile service switching center with a layer 3 service request message (COMPLETE LAYER 3 INFORMATION), a layer 3 service request message That is, fast group call/multicast request.

E、返回组呼/组播确认消息；E. Return group call/multicast confirmation message;

移动业务交换中心收到组呼/组播发起请求并确认呼叫权限后，返回确认消息(CM SERVICE ACCEPT)到移动台。在收到与已发送组呼/组播发起请求消息相同帧号和参考的组呼/组播确认消息后建链。After receiving the group call/multicast initiation request and confirming the calling authority, the mobile service switching center returns a confirmation message (CM SERVICE ACCEPT) to the mobile station. Establish a link after receiving the group call/multicast confirmation message with the same frame number and reference as the sent group call/multicast initiation request message.

基站控制器发送ASSIGNMENT COMMAND消息到移动台即表明建链开始。所述的建链是建立基站子系统到移动台之间的组呼信道；The base station controller sends an ASSIGNMENT COMMAND message to the mobile station to indicate the start of link establishment. The link building is to establish a group call channel between the base station subsystem and the mobile station;

所述的建链也可以是建立从移动业务交换中心组呼语音分发器一直到组呼区域小区无线信道之间的部分传输通道。The link establishment may also be to establish a part of the transmission channel from the group call voice distributor of the mobile service switching center to the wireless channel of the group call area cell.

所述部分传输通道是从移动业务交换中心组呼语音分发器到管辖组呼区域小区的基站子系统之间的A接口电路；或者为从移动业务交换中心组呼语音分发器到管辖组呼区域小区的基站子系统之间的A接口电路和管辖组呼区域小区的基站子系统到组呼区域小区的地面电路资源；或者为从移动业务交换中心组呼语音分发器到管辖组呼区域小区的基站子系统之间的A接口电路和管辖组呼区域小区的基站子系统到组呼区域小区的无线电路资源。The part of the transmission channel is from the mobile service switching center group call voice distributor to the A interface circuit between the base station subsystem of the sub-system in the group call area; or from the mobile service switching center group call voice distributor to the group call area The A interface circuit between the base station subsystems of the cell and the ground circuit resource from the base station subsystem of the cell in charge of the group call area to the cell in the group call area; The A interface circuit between the base station subsystems and the radio circuit resources from the base station subsystem in charge of the cells in the group call area to the cells in the group call area.

建链后，基站收发信台发送业务接受、设置参数、链接消息到移动台，表明网络侧准备就绪，发起组呼的组呼区域小区组呼/组播信道建立。After the link is established, the base transceiver station sends service acceptance, parameter setting, and link messages to the mobile station, indicating that the network side is ready, and the group call/multicast channel of the group call area cell that initiates the group call is established.

F、发送信道模式修改消息到移动台；F. Send a channel mode modification message to the mobile station;

在收到移动业务交换中心发送的指配请求后，基站控制器发送信道模式修改消息到移动台。因为之前已经指定业务信道为信令交互信道，所以该步骤中不需要再进行一次建链流程，仅需要修改当前信道模式为信令交换模式。After receiving the assignment request sent by the mobile services switching center, the base station controller sends a channel mode modification message to the mobile station. Because the service channel has been designated as the signaling exchange channel before, there is no need to perform a link establishment process again in this step, and only the current channel mode needs to be changed to the signaling exchange mode.

G、返回信道模式修改响应消息，组呼/组播信道建立；G. Return the channel mode modification response message, and establish the group call/multicast channel;

基站控制器还需要发送ASSIGNMENT COMPLETE消息到移动业务交换中心表明可以进行组呼/组播。The base station controller also needs to send an ASSIGNMENT COMPLETE message to the mobile service switching center to indicate that the group call/multicast can be performed.

图4中从移动业务交换中心发送链接消息到移动台的步骤后，到释放上行通道之前，进行多道信令交互以建立其他小区组呼/组播链路，其他小区组呼/组播信道建立。In Figure 4, after the step of sending the link message from the mobile service switching center to the mobile station, before releasing the uplink channel, perform multi-channel signaling interaction to establish other cell group call/multicast links, other cell group call/multicast channels Establish.

H、组呼发起者在组呼信道中进行讲话或监听；H. The group call initiator speaks or monitors in the group call channel;

组呼/组播建立后，组呼区域小区内的移动台转至组呼信道，组呼发起者在该信道进行监听。After the group call/multicast is established, the mobile stations in the cell of the group call area switch to the group call channel, and the group call initiator monitors the channel.

为节省时间，本实施方式将组呼权限认证组呼属性获取等步骤调到后面：In order to save time, in this embodiment, steps such as group call authorization authentication and group call attribute acquisition are transferred to the back:

I、进行组呼/组播权限认证；I. Perform group call/multicast authority authentication;

移动业务交换中心检查在移动台拜访位置寄存器(VLR)的记录，判断该移动台是否具有快速发起该组呼/组播的呼叫权限，如果有，组呼区域小区中的移动台继续在组呼/组播信道进行监听；否则，该移动台的快速组呼/组播将被移动业务交换中心释放，本次快速组呼/组播呼叫失败。The mobile service switching center checks the record in the mobile station visitor location register (VLR), and judges whether the mobile station has the call authority to initiate the group call/multicast quickly. If so, the mobile station in the group call area cell continues to make a group call /multicast channel to monitor; otherwise, the mobile station's fast group call/multicast will be released by the mobile service switching center, and this fast group call/multicast call fails.

由于预先在VLR设置有所有移动台的发起组呼/组播呼叫权限，所以查询VLR就可以获取该移动台的组呼/组播权限。Since the VLR is pre-set with the group call/multicast call authority of all mobile stations, the group call/multicast authority of the mobile station can be acquired by querying the VLR.

J、进行组呼/组播属性获取。J. Perform group call/multicast attribute acquisition.

此步骤中，移动业务交换中心根据发起快速组呼呼叫移动台的Group ID和Cell ID向组呼寄存器查询组呼/组播属性信息；组呼寄存器返回组呼/组播属性，并且将组呼/组播标记为正在呼叫；移动业务交换中心收到组呼/组播属性。In this step, the mobile service switching center queries the group call register for group call/multicast attribute information according to the Group ID and Cell ID of the mobile station that initiates the fast group call call; the group call register returns the group call/multicast attribute, and the group call /Multicast is marked as calling; Mobile Services Switching Center receives group call/multicast attributes.

所述组呼/组播属性包括组呼/组播区域小区列表、组呼/组播区域标识、组呼优先级、调度台信息等。The group call/multicast attributes include group call/multicast area cell list, group call/multicast area identifier, group call priority, dispatcher information, and the like.

由于组呼/组播属性中包括发起该次组呼/组播所对应的组呼区域小区列表，所以本发明可以使移动业务交换中心通过组呼/组播寄存器存储的组呼/组播区域小区列表确定组呼/组播区域的小区，从而判定所占用建立好的从移动业务交换中心到组呼/组播区域小区的业务通道是否为到所有所确定组呼/组播区域小区的传输通道，如果是，则组呼/组播区域小区中的移动台继续在组呼/组播信道进行监听；否则，则可以再次建立从移动业务交换中心到没有占用的组呼/组播区域小区的传输通道。Since the group call/multicast attribute includes the group call area cell list corresponding to the group call/multicast that initiates the group call/multicast, the present invention can make the group call/multicast area stored by the group call/multicast register stored by the mobile service switching center The cell list determines the cells in the group call/multicast area, so as to determine whether the occupied and established service channel from the mobile service switching center to the group call/multicast area cells is the transmission to all the determined group call/multicast area cells channel, if it is, the mobile station in the group call/multicast area cell continues to monitor the group call/multicast channel; otherwise, it can be established again from the mobile service switching center to the unoccupied group call/multicast area cell transmission channel.

从以上可以看出，本发明在组呼/组播建立时采用立即指配业务信道的立即指配流程来建立移动台和网络的信令连接。即在移动台向网络发起的第一条信令-信道请求的原因值中标明组呼/组播呼叫类型，让网络识别该呼叫类型为组呼/组播，从而立即指配一条速度较快的业务信道用以组呼/组播建立时的信令交互。It can be seen from the above that the present invention adopts the immediate assignment process of immediately assigning traffic channels to establish the signaling connection between the mobile station and the network when the group call/multicast is established. That is, the group call/multicast call type is marked in the cause value of the first signaling-channel request initiated by the mobile station to the network, so that the network can identify the call type as group call/multicast, and immediately assign a faster The traffic channel is used for signaling interaction when group call/multicast is established.

由于SD信道是每51帧中才包含一个块用于传送信令，也就是235ms，而业务信道中，每26帧中有6块用于传送信令，也就是每20ms一块。所以在业务信道上建链和传送信令要比在SD信道上平均快(235-20)/2＝108ms。Since the SD channel contains only one block in every 51 frames for signaling transmission, that is, 235 ms, and in the traffic channel, 6 blocks in every 26 frames are used for signaling transmission, that is, one block in every 20 ms. Therefore, it is faster (235-20)/2=108ms on average to establish a link and transmit signaling on the service channel than on the SD channel.

另外，由于在步骤C中发起组呼/组播时的立即指配业务信道到建立组呼/组播链路的信道没有改变，因此在步骤E中建立组呼/组播链路时不再需要现有技术中组呼/组播建立与确认的多道信令交互过程，因此进一步节省时间，减少系统负载和出错的机会。In addition, since the immediately assigned service channel when initiating a group call/multicast in step C has not changed to the channel for establishing a group call/multicast link, there is no longer any change in setting up a group call/multicast link in step E. The multi-channel signaling interaction process of group call/multicast establishment and confirmation in the prior art is required, thus further saving time, reducing system load and chance of errors.

此外，步骤F的发送信道模式修改消息到移动台后，不需要返回UA应答信令，因此再进一步节省组呼/组播建立时间。In addition, after sending the channel mode modification message to the mobile station in step F, there is no need to return UA response signaling, thus further saving the group call/multicast establishment time.

因此，在组呼/组播呼叫时，由移动台主动请求网络立即指配速度较快的业务信道来进行信令交互，克服现有技术组呼/组播建立的立即指配流程之前网络无法识别组呼/组播呼叫而经常立即指配SD信道的缺陷，因此大大加快组呼/组播的发起过程。Therefore, during a group call/multicast call, the mobile station actively requests the network to immediately assign a faster traffic channel to perform signaling interaction, which overcomes the network's inability to establish an immediate assignment process for the prior art group call/multicast establishment. Recognizing the defects of a group call/multicast call often assigns an SD channel immediately, thus greatly speeding up the group call/multicast initiation process.

本实施方式将组呼权限认证组呼/组播属性获取等步骤调到整个流程的最后面，进一步节省了时间。当然，也可以将组呼权限认证组呼/组播属性获取等步骤安排在步骤E后进行。In this embodiment, steps such as group call authority authentication, group call/multicast attribute acquisition, etc. are transferred to the last end of the whole process, which further saves time. Of course, steps such as group call authority authentication, group call/multicast attribute acquisition, etc. can also be arranged after step E.

即移动业务交换中心收到该层三业务请求后确定本次呼叫为快速组呼/组播呼叫，则检查在拜访位置寄存器的记录，判断该移动台是否具有快速发起该组呼/组播的呼叫权限，如果有，执行下一步骤；否则，释放此次组呼/组播请求并告知失败。That is, after receiving the layer 3 service request, the mobile service switching center determines that the call is a fast group call/multicast call, then checks the record in the visitor location register to determine whether the mobile station has the ability to quickly initiate the group call/multicast call. Call authority, if yes, go to the next step; otherwise, release the group call/multicast request and report failure.

所述组呼权限认证组呼/组播属性获取步骤I、J也可以调整到步骤D和E之间。The steps I and J of obtaining the group call/multicast attribute of the group call authority authentication can also be adjusted between steps D and E.

本发明精神范围内，可以有更多变更实施方式。比如在步骤F中，发送SETUP消息到移动业务交换中心建链的步骤可以在步骤C的移动台发送设置异步平衡模式消息(SABM)中完成。即移动台采用偷帧方式发送携带SETUP消息的设置异步平衡模式消息建链，以节省一条信令的交互，节省时间；步骤A中，用以表明组呼/组播请求的原因值不限于“01100x01”、“01100011”字节，可以采用表一中其他字节作为组呼/组播呼叫的专用信道请求原因值，同时调整网络侧，使其可辨认这些原因值。Within the scope of the spirit of the present invention, there may be more modified embodiments. For example, in step F, the step of sending a SETUP message to the mobile service switching center to establish a link can be completed in step C of sending a setup asynchronous balance mode message (SABM) by the mobile station. That is to say, the mobile station uses frame stealing to send a set asynchronous balance mode message carrying a SETUP message to build a link, so as to save a signaling interaction and save time; in step A, the reason value used to indicate the group call/multicast request is not limited to " 01100x01" and "01100011" bytes, other bytes in Table 1 can be used as the cause value of the dedicated channel request of the group call/multicast call, and the network side should be adjusted to recognize these cause values.

参阅图5，本发明还提出一种组呼/组播建立系统，其包括系统设备、移动台40以及操作维护设备20三部分组成。系统设备包括基站子系统30和网络子系统10。简单的说，基站子系统30提供移动台40与网络之间的无线链路，网络子系统10负责处理移动台40的各种业务请求，其包括移动业务交换中心11。Referring to FIG. 5 , the present invention also proposes a group call/multicast establishment system, which consists of three parts: system equipment, mobile station 40 and operation and maintenance equipment 20 . System equipment includes a base station subsystem 30 and a network subsystem 10 . In short, the base station subsystem 30 provides a wireless link between the mobile station 40 and the network, and the network subsystem 10 is responsible for processing various service requests of the mobile station 40 , which includes a mobile service switching center 11 .

移动台40为用户可以直接操作的设备，包括信道请求发送模块41。移动台40根据工作环境和应用目的可以分为手持终端、车载台。另外还可以替换为调度台、固定台等。The mobile station 40 is a device that can be directly operated by the user, and includes a channel request sending module 41 . The mobile station 40 can be classified into a handheld terminal and a vehicle-mounted station according to the working environment and application purpose. In addition, it can also be replaced by a dispatching station, a fixed station, etc.

操作维护设备20包括两种，一种由运营商使用，对网络设备进行维护管理；一种为企业用户使用，对本企业内的成员进行管理。The operation and maintenance equipment 20 includes two types, one is used by operators to maintain and manage network equipment; the other is used by enterprise users to manage members in the enterprise.

基站子系统30包括基站控制器31、基站收发信台32以及业务信道指配模块311。所述业务信道指配模块311作为基站子系统30的一部分，也可以是单独的模块。The base station subsystem 30 includes a base station controller 31 , a base transceiver station 32 and a traffic channel assignment module 311 . The traffic channel assignment module 311 may be a part of the base station subsystem 30, or it may be an independent module.

具体操作上，信道请求发送模块41根据用户发起的组呼/组播发起请求，在移动台40向网络发起的信道请求原因值中标明组呼/组播呼叫类型，要求网络指配业务信道。In specific operations, the channel request sending module 41 indicates the group call/multicast call type in the channel request cause value initiated by the mobile station 40 to the network according to the group call/multicast initiation request initiated by the user, and requires the network to assign a service channel.

所述基站控制器31接收信道请求并返回确认消息。所述确认消息是含业务信道信息的立即指配消息。然后业务信道指配模块311进行立即指配所述业务信道操作。The base station controller 31 receives the channel request and returns an acknowledgment message. The confirmation message is an immediate assignment message including traffic channel information. Then the traffic channel assignment module 311 performs an operation of immediately assigning the traffic channel.

移动台40可以发送携带SETUP消息的设置异步平衡模式消息开始立即指配所述业务信道。The mobile station 40 can start immediately assigning the traffic channel by sending a Set Asynchronous Balanced Mode message carrying a SETUP message.

以上对本发明所提供的一种组呼/组播建立方法及系统进行了详细介绍，本文中应用了具体个例对本发明的原理及实施方式进行了阐述，以上实施例的说明只是用于帮助理解本发明的方法及其核心思想；同时，对于本领域的一般技术人员，依据本发明的思想，在具体实施方式及应用范围上均会有改变之处，综上所述，本说明书内容不应理解为对本发明的限制。The method and system for establishing a group call/multicast provided by the present invention have been introduced in detail above. In this paper, specific examples are used to illustrate the principle and implementation of the present invention. The description of the above embodiments is only used to help understanding The method of the present invention and its core idea; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation and scope of application. In summary, the content of this specification should not be construed as a limitation of the invention.

Claims (15)

1. group-call/multicast establishing method is characterized in that: comprise step:

A, transmission require the channel request of assignment Traffic Channel;

C, the described Traffic Channel of assignment immediately.

2. group-call/multicast establishing method according to claim 1 is characterized in that: between steps A and C, also comprise step: B, return acknowledge message.

3. group-call/multicast establishing method according to claim 2 is characterized in that: described acknowledge message is the immediate assignment message that contains traffic channel information.

4. group-call/multicast establishing method according to claim 1 is characterized in that: channel request message described in the steps A comprises the cause value of representing group-call/multicast to call out.

5. group-call/multicast establishing method according to claim 4 is characterized in that: described to comprise the cause value of representing group-call/multicast to call out be " 01100001 ", " 01100101 " or " 01100011 ".

6. according to each described group-call/multicast establishing method of claim 1 to 5, it is characterized in that: after step C, also comprise step:

D, reporting group call/multicast initial request messages are given mobile services switching centre;

E, return the group-call/multicast acknowledge message.

7. group-call/multicast establishing method according to claim 6 is characterized in that: after step e, also comprise step:

F, transmitting channel schema modification message are to travelling carriage;

G, Return Channel schema modification response message, the group-call/multicast channel is set up;

H, in the group-call/multicast channel, talk or monitor.

8. group-call/multicast establishing method according to claim 7 is characterized in that: between step D and the E or after step H, also comprise step:

I, carry out the group-call/multicast purview certification;

J, carry out the group-call/multicast attribute and obtain.

9. group-call/multicast establishing method according to claim 1 is characterized in that: the described Traffic Channel step of the assignment immediately among the step C is from transmission Asynchronous Balanced Mode message to be set.

10. group-call/multicast establishing method according to claim 9 is characterized in that: described transmission is provided with Asynchronous Balanced Mode message and is: adopt to steal the frame mode send carry SETUP message Asynchronous Balanced Mode message is set.

11. group-call/multicast establishing method according to claim 1 is characterized in that: among the step C, the described channel request of identification requires assignment Traffic Channel, the described Traffic Channel of assignment immediately.

12. a group-call/multicast is set up system, it is characterized in that: comprise channel request sending module and Traffic Channel Assignment module, described channel request sending module sends the channel request that requires the assignment Traffic Channel, and described Traffic Channel Assignment module is carried out the described Traffic Channel operation of assignment immediately.

13. group-call/multicast according to claim 12 is set up system, it is characterized in that: also comprise base station controller, the request of described base station controller receive channel is also returned acknowledge message.

14. group-call/multicast according to claim 13 is set up system, it is characterized in that: described channel request message comprises the cause value of representing group-call/multicast to call out, and described acknowledge message is the immediate assignment message that contains traffic channel information.

15. group-call/multicast according to claim 12 is set up system, it is characterized in that: the Asynchronous Balanced Mode message that is provided with that described channel request sending module carries SETUP message from transmission begins the described Traffic Channel of assignment immediately.

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